Adverse Possession Survey
The question I have is, how do you do a boundary line adjustment between one owner and no one? That's what the quite title process is for.
Also, what do you mean no record owner? If the patent didn't go to the river it is still public land and BLM is the "owner" . If it did, the owner is the last person who had a deed that included the area in question or the heirs. If there were no heirs tour state will have regulations for that. Usually that means the state owns it.
How wide is it? If it is narrow enough the doctrine of strips and gores might apply, which would mean your client already owns it.
Just becasue it is not being taxed doesn't mean someone doesn't own it. I wouldn't want to be involved in helping a client take land from someone else, even if that someone else doesn't realise they own it.
You make want to sit down and read the Montana Subdivision and Platting Act again. Every BLA I have ever been part of requires all parties to sign the agreement. And depending on which county you are in, you may have a hard time getting that through, without crossing the Rubicon so to speak.
If things were that easy, I would own a huge piece of the Flying D and not have to work a day for the rest of my life.
I run into Gore's and overlaps quite often. The subdivision was done in the 1950s. I suppose one should try and locate heirs of the subdividers, but I say why bother. It appears the additional land is probably accretion. The Lawyer says just survey what land the client wants and have him file Quiet Title on it. That seems more like stealing it than Adverse Possession. I would guess if you contacted the heirs they wouldn't have a clue what you were talking about. I'm not sure what the County Planner would say about a one owner BLA. I'll have to approach them on it. Adverse Possession has a dirty ring to it, but it's legal.
Knowing where your boundary is at AND THEN attempting to possess adjacent property is a sure fire way to scuttle an AP claim in Oklahoma.
First of all you know nothing about AP, and it would take 10 or 25 years not 5 years. The 5 years is for a deed.
Also go take an Ethics class.